Spam filtering using RBL -setup assistance

Thank you for taking the time to read this post. I am an IT consultant for small and smaller medium sized business customers. Unfortunately, my job entails me knowing a little of everything rather than being focused solely on perimeter UTM devices like many of you. That makes it much harder for me to be able to sort through all of the posts and find the proper information. My goal is to enable RBL and some other anti-spam blocking lists within my customer' s fortigate units. My customers typically have either WiFi60B or 60B units. What I would really like would be the exact and proper coding to enter into my WiFi60B (FortiWiFi-60B 3.00-b5101(MR5 Patch 2)) unit so I can test it on myself (not the customer). I have read and read the forums. I have found 5 different ways to enter the information (all through CLI) and it has not worked. I was wondering if someone with excellent understanding of the product could provide me with the proper codes to enter. Thanks in advance, John